Glauberite Mineral Data (original) (raw)
General Glauberite Information
Chemical Formula:
Na2Ca(SO4)2
Composition:
Molecular Weight = 278.18 gm
Sodium 16.53 % Na 22.28 % Na2O
Calcium 14.41 % Ca 20.16 % CaO
Sulfur 23.05 % S 57.56 % SO3
Oxygen 46.01 % O
______ ______
100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:
Na2Ca(SO4)2
Environment:
Dry salt-lake beds or marine evaporite deposits, generally in desert climates.
IMA Status:
Valid Species (Pre-IMA) 1808
Locality:
El Castellar mine, Villarrubia de Santiago, Castile-La Mancha, Spain Link to MinDat.org Location Data.
Name Origin:
Named after Glauber's Salt, of alchemist origin which is named for Johann Rudolf Glauber (1604-1668), German alchemist.
Name Pronunciation:
Glauberite + Pronunciation 
Synonym:
Glauber's Salt
ICSD 26773
PDF 19-1187
Glauberite Image
Images:
Images:
Glauberite Crystallography
Axial Ratios:
a:b:c =1.2194:1:1.0273
Cell Dimensions:
a = 10.129, b = 8.306, c = 8.533, Z = 4; beta = 112.183° V = 664.76 Den(Calc)= 2.78
Crystal System:
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io): 3.13(1), 2.66(0.8), 6.22(0.8),
Forms:
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| | Forms:( 1 1 1) ( 1 1 0) ( 1 0 0) ( 0 0 1) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | ---------------------------------------------------------------------------------------------------------------------------------------------------------------- |
Crystal Structure:
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| | Araki T , Zoltai T , American Mineralogist , 52 (1967) p.1272-1277, Refinement of the crystal structure of a glauberite | | -------------------------------------------------------------------------------------------------------------------------- |
Physical Properties of Glauberite
Cleavage:
{001} Perfect
Color:
Colorless, Gray, Gray white, Yellow, Yellowish white.
Density:
2.7 - 2.85, Average = 2.77
Diaphaneity:
Transparent to translucent
Fracture:
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Habit:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Glauberite
Gladstone-Dale:
CI meas= -0.014 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1888,KPDmeas= 0.1891,KC= 0.1865
Ncalc = 1.5 - 1.53
Optical Data:
Biaxial (-), a=1.507-1.515, b=1.527-1.535, g=1.529-1.536, bire=0.0210-0.0220, 2V(Calc)=24-34, 2V(Meas)=0-7. Dispersion strong, r > v.
Pleochroism (x):
colorless.
Pleochroism (y):
colorless.
Calculated Properties of Glauberite
Electron Density:
Bulk Density (Electron Density)=2.76 gm/cc
note: Specific Gravity of Glauberite =2.78 gm/cc.
Fermion Index:
Fermion Index = 0.0021443772
Boson Index = 0.9978556228
Photoelectric:
PEGlauberite = 3.43 barns/electron
U=PEGlauberite x rElectron Density= 9.47 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Glauberite is Not Radioactive
Glauberite Classification
Dana Class:
28.04.02.01 (28)Anhydrous Acid and Sulfates
(28.04)with miscellaneous formulae
(28.04.02)Dana Group
28.04.02.01 Glauberite Na2Ca(SO4)2 C 2/c 2/m
Strunz Class:
07.AD.25 07 - SULFATES (SELENATES, TELLURATES)
07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O
07.AD -With only large cations
07.AD.25 Glauberite Na2Ca(SO4)2 C 2/c 2/m
Other Glauberite Information
See Also:
Links to other databases for Glauberite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineral and Gemstone Kingdom
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST
18 - theimage
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Print or Cut-and-Paste your Glauberite Specimen Label here :
Glauberite
Na2Ca(SO4)2
Dana No: 28.04.02.01 Strunz No: 07.AD.25
Locality:
Notes: